Direct fixation fastener



FIG. 1 is a top front perspective view of the direct fixation fastener of the present design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a left elevational view thereof.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a direct fixation fastener, as shown and described. 